Hey there… my wife’s very talented grandfather painted a portrait of our goldendoodle Berkeley a while ago, and I’ve been meaning to build a custom picture frame for it. It was much trickier than I had expected… and a great way to practice routing and mitre cuts.

Here’s how the final build turned out:

DIY Custom Picture Frame – A painting of my dog Berkeley

Next time, I think I’ll rout the front facing edges to create a more decorative look.

Step 2: Create two short and two long frame pieces

Long and short frame pieces

My frame needs to hold a 9 x 12″ painting. That means that I need to create two short frame pieces 9 1/16 in length and two long frame edges 12 1/16 in length.

2.1 First, take “A” and mitre a 45 degree angle from the left with the routed edge on the inside of the frame. Next, measure 12 1/16″ on the routed edge and mitre a 45 degree in the opposite direction to create your first long frame piece – “A1”.

2.2 Next, take the remaining “A” piece and create another 45 degree mitre from the left side with the routed edge on the inside of the frame. Measure 9 1/16″ on the routed edge and mitre a 45 degree in the opposite direction to create your first short frame piece – “A2”.

Repeat steps 2.1 and 2.2 above for “B” creating long edge “B1” and short edge “B2”.